Tiger ear grass belongs to the family of tiger ear grass and is a perennial herbaceous plant with long glandular hairs on its stem; The basal leaves have long petioles, and the leaves have heart-shaped, kidney shaped, and oblate shapes; The stem and leaves are lanceolate in shape, with cone-shaped inflorescence, and the flowering and fruiting period is from April to November. Named after its large leaves resembling tiger ears, it was first recorded in a local herbal book during the Southern Song Dynasty called "Lu Yan Ben Cao". Tiger ear grass is distributed in provinces such as Anhui, Fujian, Guangdong, Guangxi, Guizhou, and southeastern Gansu in China, as well as in North Korea and Japan; It mainly grows under forests, shrubs, meadows, and damp rock crevices at an altitude of 400-4500 meters.